libsysprof-ui: land new UI design

This comprises a massive rewrite of the UI for browsing captures. We use
the SysprofAid class to scan capture files for content and then auto-
matically add visualizers and details pages.

To avoid breaking things incrementally, we just land this as a very large
commit. Not necessarily ideal, but given the amount of stuff that could
break, this is easier.

As part of this process, we're removing a lot of the surface API so that
we can limit how much we need to maintain in terms of ABI.

src/libsysprof-ui/sysprof-cell-renderer-percent.c

@@ -18,6 +18,8 @@
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
+#define G_LOG_DOMAIN "sysprof-cell-renderer-percent"
+
 #include "config.h"
 
 #include <glib/gi18n.h>